Y-adapter



FIG. 1 is a perspective view of a Y-adapter, showing my new design;

FIG. 2 is a top plan view thereof, the bottom plan view is a mirror image thereto; and,

FIG. 3 is a side elevation view thereof, the opposite side elevation view is a mirror image thereto.

The broken line showing of the environment is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a Y-adapter, as shown and described. 